Congress has tried to regulate ballast water in ships in
order to stop the spread of zebra mussels, but so far loopholes in
the law and tussles over policy have made the effort
by Michelle Nijhuis,
Mar 05, 2007
Research hydrologist Gordon Grant is fascinated by the groundwater in the Pacific Northwest.
by Jane Braxton Little ,
Jan 16, 2009
A long time ago, the earth warmed considerably; now, scientists study fossils to find out what happened – and what it might mean for us today.
by J. MADELEINE NASH,
Oct 13, 2008